I was able to dig out the MRP forecast table which was as follows.
MRP Forecast Relevant Table
MAPR - Material Index for Forecast
DBPR - Material Index MRP Area for Forecast
PROP - Forecast parameters
PROW - Forecast Values
S031 - Statistics: Movements for current stocks
S033 - Statistics: Movements for Current Stock (Individual Records)
With the MRP table, I found the
forecast data were stored in table PROP
MRP Forecast Data Link
Key Field:
PROP-PNUM1 - Pointer: forecast parameters
Material Index for Forecast
MAPR-PNUM1 - PROP-PNUM1
Material Index MRP Area for Forecast
DBPR-PNUM1 - PROP-PNUM1
With the information of table MAPR and DBPR the abap programmer was able to do the necessary changes to the MRP customized report.
